Question

8 questions medal and follow

Answer 1

Question 1 (Essay Worth 4 points)

The owner of a large company is conducting a survey about job satisfaction, including questions about salary, hours, stress, and other conditions. There are about eight hundred employees in the company, including one hundred executive positions, six hundred fifty middle-management positions, and fifty custodial positions. The owner wants to include about ten percent of his employees in the survey sample.

Identify a sampling method that would lead to a representative sample for the survey. Explain why it would be a good choice and give details about the process.




Question 2 (Essay Worth 4 points)

The owner of a large company is conducting a survey about job satisfaction, including questions about salary, hours, stress, and other conditions. There are about eight hundred employees in the company, including one hundred executive positions, six hundred fifty middle-management positions, and fifty custodial positions. The owner wants to include about ten percent of his employees in the survey sample.

Identify a sampling method that might produce a biased sample. Explain why using the method for this survey would be a poor choice.




Question 3 (Multiple Choice Worth 2 points)

A neurobiologist is launching a nationwide professional study on the connection between text messaging and a particular type of brain function. The population of his study is twelve- to thirty-two-year-old people who text at least once a day. He wants to make sure that the whole range of ages is represented in the study. Which kind of sampling would provide the most reliable information for this study?

convenience sampling

simple random sampling

systematic sampling

volunteer sampling

Question 4 (Multiple Choice Worth 2 points)

Which of the following should not need to be considered when trying to ensure that a sample for a survey will be representative of the population?

guesses about survey results

make-up of the population

method of sampling

size of sample

Question 5 (Multiple Choice Worth 2 points)

Bethany belongs to an outdoor club in her town. The members of the club are planning a community event for which they want to make T-shirts. The leader of the club takes a vote on the preferred color of the T-shirts. The results are shown in the table.

A table shows how many people preferred each color T-shirt. 5 people preferred white, 4 people preferred pink, 6 people preferred green, 2 people preferred black, and 3 people preferred red.

If all members of the club were included in the survey, which statement is a correct conclusion?

The club prefers white T-shirts.

1 out of 5 every club members prefers pink T-shirts.

Twenty percent of the club prefers black T-shirts.

Red is the least preferred T-shirt color.

Question 6 (Multiple Choice Worth 2 points)

The director of a children's ballet center is conducting surveys to get feedback about the classes. There are three types of classes, each for a particular age range: 3 through 5, 6 through 8, and 9 through twelve. What term can we use to describe all students in classes for 6 through 8 year olds?

experimental unit

population

sample

subgroup

Question 7 (Multiple Choice Worth 2 points)

The principal at a school with eight hundred students is considering changes to the lunch menu. She wants to get the opinions of all of the students about their favorite menu items. So she asks the first 5 students who get off the bus in the morning. Which statement does not reflect the situation?

The sample is biased.

The principal collected a representative sample.

The sample size is too small.

The principal used convenience sampling.

Question 8 (Multiple Choice Worth 2 points)

A biologist is conducting research on four different types of fish found in a local lake. The numbers of each type are shown in the table.

A table shows the number of fish found in a location. There were ninety small-mouth bass found, two hundred eighty crappies found, sixty sunfish found, and one hundred twenty yellow perch found.

She plans to use a stratified sampling method in which twenty percent of the total population is included in the studies. How many yellow perch will be in her sample?

6

twelve

eighteen

twenty-four

Answer 2

@Whitemonsterbunny17 @texaschic101 @Anonymous_101_

Answer 3

Ohhhh I'm sorry, I kinda suck at this kind of stuff. :s

Answer 4

1.800 employees, want to sample 10%, so the sample size will be 80.

You want a representative sample with the same proportion of workers as the whole population.

Take 10% of each of the different positions:

10% of 100 = 10 executives
10% of 650 = 65 middle managers
10% of 50 = 5 custodial workers

So pick 10 random executives, 65 random middle managers, and 5 random custodial workers. That way your sample is representative of the population.

Answer 5

is it helpful

Answer 6

@TheOcean @tanya123 @Snoopy_Lascano @grabill @evilbrand97 @asatt32 @bbcream14 @Battlehero01

Answer 7

-_- can u help plz

Answer 8

-_-

Answer 9

systematic sampling

Answer 10

guesses about survey results

Answer 11

-_-

Answer 12

does that face means your not satisfied ?

Answer 13

@texaschic101

Answer 14

yes

Answer 15

no satisfaction

Answer 16

1 of 5 prefers pink, because the total is 20, people who like pink is 4/20 = 1/5

Answer 17

what

Answer 18

are you confused with something ?

Answer 19

could u answer them like this cause those are my last questions^^
1.
2.
3.
4
5.
do u get what im trying to say?

Answer 20

he needs help with it

Answer 21

ok

Answer 22

3. systematic sampling

4. guesses about survey results

5. 1 of 5 prefers pink, because the total is 20, people who like pink is 4/20 = 1/5

Answer 23

6. B: population

Answer 24

7. 24

Answer 25

better? @hippo4

Answer 26

yesh

Answer 27

wait how is 7. 24?

Answer 28

@tanya123

Answer 29

do you know how to take out a percentage ?

Answer 30

what do you mean into a decimal?

Answer 31

it says ----She plans to use a stratified sampling method in which twenty "percent" of the total population is included in the studies. How many yellow perch will be in her sample?

Answer 32

could i have the answers

Answer 33

There are 550 fish in the location of which 120 are yellow perch.
Yellow perch make up 120/550 of the total fish found.

If 20% of the total found fish are to comprise the sample, then 20% of 550 or 110 fish will be in the sample. The number of yellow perch in the sample is given by the proportion:

120/550 = x / 110 where x is the number of yellow perch in the sample
Solving for x yields 24 yellow perch.

Does that makes sense to you @hippo4

Answer 34

nope

Answer 35

kk is that for 2?

Answer 36

which one ?

Answer 37

the one right above my nope

Answer 38

dude tell me the question number !

Answer 39

like wats 1,2

Answer 40

@tanya123

Answer 41

@katragaddasaichandra helped you already ! for those one's